For example, you could set the versiontag prefix to be:

    git config --global gitflow.prefix.versiontag "production/\$(date +%Y/%m/%d/)"

which would result in tag names like:

    production/2010/09/22/my-hotfix-or-feature-name

NOTE:
Although this is a useful addition in the current version of git-flow,
in a future reimplementation of it in Python, this will be replaced by
hook scripts, so be sure not to rely on this feature too much for now.